I did RTFA did you? TFA has no mention of Firefox or Mozilla, nor why the download at runtime approach that Firefox uses is not viable for them. Firefox doesn't

I did RTFA did you? TFA has no mention of Firefox or Mozilla, nor why the download at runtime approach that Firefox uses is not viable for them. Firefox doesn't bundle widevine in their distribution. That changes things here. Maybe it's still not viable for some reason, but TFA certainly doesn't go into it at all.